An SRV record, which stands for Service record, is a DNS entry which is used to define the servers which run a specific service for a domain. Quite simply, you will be able to use your domain not only for an Internet site, but also for an instant messaging server, a video streaming host or perhaps a Voice-Over-IP server, for instance, while you still have an Internet site with it. If you set up the SRV record, you may choose what Internet Protocol it is going to use, on which port the connection to the particular server is going to be established plus the priority and the weight of the record in case that you have several SRV records for the exact same service. The latter option allows you to use different machines for load balancing and redundancy. With this type of DNS records, you could use the same domain many different purposes and even with different providers in case the same one can't provide all services you need.